ERIC Number: EJ850885
Record Type: Journal
Publication Date: 2007-Nov
Abstractor: As Provided
Reference Count: 0
Variable Perception of White Noise in Ambiguous Phonetic Contexts: The Case of /p/ and /f/
Shafiro, Valeriy; Raphael, Lawrence J.
Journal of Psycholinguistic Research, v36 n6 p457-467 Nov 2007
The roles of spectro-temporal coherence, lexical status, and word position in the perception of speech in acoustic signals containing a mixture of speech and nonspeech sounds were investigated. Stimuli consisted of nine (non)words in which either white noise was inserted only into the silent interval preceding and/or following the onset of vocalic transitions ambiguous between /p/ and /f/, or in which white noise overlaid the entire utterance. Ten listeners perceived 85% /f/s when noise was inserted only into the silent interval signaling a stop closure, 47% /f/s when noise overlaid the entire (non)words, and 1% in the control condition that contained no noise. Effects of spectro-temporal coherence seemed to have dominated perceptual outcomes, although the lexical status and position of the critical phoneme also appeared to affect responses. The results are explained more adequately by the theory of Auditory Scene Analysis than by the Motor Theory of Speech Perception.
Descriptors: Intervals, Rhetoric, Auditory Perception, Context Effect, Speech Communication, Nonverbal Communication, Auditory Stimuli, Theories
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
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